INFO: task kworker/0:1H:2006 blocked for more than 143 seconds. Not tainted 5.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1H state:D stack:27672 pid: 2006 ppid: 2 flags:0x00004000 Workqueue: glock_workqueue glock_work_func Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5073 schedule+0x14b/0x200 kernel/sched/core.c:5152 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x117/0x120 kernel/locking/rwsem.c:1407 freeze_super+0x44/0x3c0 fs/super.c:1664 freeze_go_sync+0x17b/0x3a0 fs/gfs2/glops.c:574 do_xmote+0x6b7/0x14c0 fs/gfs2/glock.c:630 glock_work_func+0x2c3/0x450 fs/gfs2/glock.c:934 process_one_work+0x789/0xfd0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.1:13465 blocked for more than 143 seconds. Not tainted 5.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:25856 pid:13465 ppid: 8387 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5073 schedule+0x14b/0x200 kernel/sched/core.c:5152 schedule_timeout+0x43/0x250 kernel/time/timer.c:1868 do_wait_for_common+0x266/0x3a0 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 flush_workqueue+0x704/0x1620 kernel/workqueue.c:2838 gfs2_gl_hash_clear+0x6e/0x270 fs/gfs2/glock.c:1998 gfs2_fill_super+0x352c/0x44c0 fs/gfs2/ops_fstype.c:1254 get_tree_bdev+0x406/0x630 fs/super.c:1292 gfs2_get_tree+0x50/0x200 fs/gfs2/ops_fstype.c:1277 vfs_get_tree+0x86/0x270 fs/super.c:1497 do_new_mount fs/namespace.c:2903 [inline] path_mount+0x188a/0x29a0 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46797a RSP: 002b:00007f6f4e733fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046797a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f6f4e734000 RBP: 00007f6f4e734040 R08: 00007f6f4e734040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f6f4e734000 R15: 0000000020047a20 Showing all locks held in the system: 3 locks held by kworker/u4:1/25: #0: ffff8880b9c34c98 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x82e/0xb00 kernel/sched/fair.c:10633 #1: ffff8880b9c1f808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x224/0x5c0 kernel/sched/psi.c:833 #2: ffffffff8c710280 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:266 1 lock held by khungtaskd/1618: #0: ffffffff8c710280 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 3 locks held by kworker/0:1H/2006: #0: ffff888017a7b138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfd0 kernel/workqueue.c:2248 #1: ffffc90007217d78 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x733/0xfd0 kernel/workqueue.c:2250 #2: ffff888027a080e0 (&type->s_umount_key#66){+.+.}-{3:3}, at: freeze_super+0x44/0x3c0 fs/super.c:1664 3 locks held by in:imklog/8072: #0: ffff8880279d5270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:961 #1: ffffffff8c710280 (rcu_read_lock){....}-{1:2}, at: rq_lock kernel/sched/sched.h:1321 [inline] #1: ffffffff8c710280 (rcu_read_lock){....}-{1:2}, at: ttwu_queue kernel/sched/core.c:3184 [inline] #1: ffffffff8c710280 (rcu_read_lock){....}-{1:2}, at: try_to_wake_up+0x5d6/0xa90 kernel/sched/core.c:3464 #2: ffff8880b9d1f808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x224/0x5c0 kernel/sched/psi.c:833 1 lock held by syz-executor.1/13465: #0: ffff888027a080e0 (&type->s_umount_key#65/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x860 fs/super.c:229 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1618 Comm: khungtaskd Not tainted 5.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x176/0x24e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xcfb/0xd40 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4801 Comm: systemd-journal Not tainted 5.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_writeback_dirty_inode_start+0x84/0x230 include/trace/events/writeback.h:133 Code: 92 c3 40 0f 92 c6 31 ff e8 a9 35 a6 ff 84 db 75 0a e8 d0 32 a6 ff e9 99 00 00 00 65 83 05 9b 09 2f 7e 01 48 8b 05 f4 48 cf 0b 67 34 7f 07 89 c3 31 ff 89 c6 e8 bc 36 a6 ff 85 db 74 10 80 3d RSP: 0000:ffffc9000101fb88 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81d2e5bf RDX: ffff888026490000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff81d2e5d7 R09: fffffbfff1b6984e R10: fffffbfff1b6984e R11: 0000000000000000 R12: ffff888011878120 R13: dffffc0000000000 R14: ffff888011878120 R15: 0000000000000001 FS: 00007fb80ca468c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb809f48028 CR3: 000000002158a000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mark_inode_dirty+0x6b/0x600 fs/fs-writeback.c:2272 generic_update_time+0x1c7/0x1e0 fs/inode.c:1766 update_time fs/inode.c:1779 [inline] file_update_time+0x327/0x380 fs/inode.c:1995 fault_dirty_shared_page+0x18d/0x310 mm/memory.c:2762 do_shared_fault+0x155/0x590 mm/memory.c:4019 do_fault mm/memory.c:4071 [inline] handle_pte_fault mm/memory.c:4318 [inline] __handle_mm_fault mm/memory.c:4453 [inline] handle_mm_fault+0x1c2d/0x2570 mm/memory.c:4551 do_user_addr_fault+0x8ce/0x1120 arch/x86/mm/fault.c:1390 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0xa1/0x1e0 arch/x86/mm/fault.c:1531 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577 RIP: 0033:0x7fb80bd4f03d Code: 0f 82 47 e5 fc ff 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 49 48 83 fa 40 0f 87 9f 00 00 00 c5 fe 6f 06 c5 fe 6f 4c 16 e0 fe 7f 07 c5 fe 7f 4c 17 e0 c5 f8 77 c3 48 3b 15 36 54 27 00 0f RSP: 002b:00007ffca780e628 EFLAGS: 00010287 RAX: 00007fb809f48028 RBX: 000055f8f7766890 RCX: 0000000000382fe8 RDX: 0000000000000027 RSI: 000055f8f7766890 RDI: 00007fb809f48028 RBP: 0000000000000027 R08: 000000000038304f R09: 000055f8f7766120 R10: 00007ffca780e7d0 R11: 00000000000107be R12: 000055f8f7765e80 R13: 0000000000000000 R14: 00007ffca780e7d8 R15: 00007fb809f47fe8